Linear Regression of Incident Precipitation Explains the Throughfall, Stemflow and Interception by the Eucalyptus Canopy under Different Fertilization Management

Abstract

The present work aims to quantify the precipitation partition after interaction with the Eucalyptus urophylla canopy under two fertilization treatments. The experimental design was completely causalized with two fertilization treatments. Each plot had a dimension of 30 m x 60 m, and the spacing of the seedlings was 3 m x 2 m. The study was developed in a arenizaded area located in the municipality of Maçambará, state of Rio Grande do Sul, Brazil. The duration of the study was one year (from April 2017 to March 2018). Biweekly over twelve months the volume of precipitation was quantified. The experiment consists of two fertilization treatments in a Eucalyptus urophylla stand: T1 with smaller and T2 greater fertilization. In each treatment 3 throughfall collectors were installed at one meter of the soil level and three stemflow collectors. In the open area 3 collectors of the incident precipitation were installed 1.5 meters from the ground level. The percentages of the throughfall, stemflow and canopy interception in relation to the incident precipitation were 95.3; 1.3 and 4.3% for treatment 1 and 91.7; 3.2 and 6.2% for treatment 2. The coefficients of determination for throughfall, stemflow and canopy interception were 0.99; 0.96 and 0.85 for treatment 1 and 0.99; 0.97 and 0.89 for treatment 2. The graphical analysis of the regression residues shows independence of the errors. The fertilization management described for treatment 2 results in a greater interception of rainfall due to the greater amount of biomass of the canopy.

Partial exclusion of precipitation: throughfall, stemflow and canopy interception in Eucalyptus plantations in southern Brazil

“…Considering the species in the present study, Eucalyptus urophylla, Arcova et al (2018) reported 89.0%, 5.4% and 5.6% for throughfall, stemflow and canopy interception for a stand at 30-year-old, respectively. Souza et al (2019) for the same species but at 1-year-old found 95.3; 1.3 and 4.3% for treatment with less fertilizer applied and 91.7; 3.2 and 6.2% for treatment with greater amount of fertilizers applied.…”

Efeitos da dinâmica pluviométrica na interceptação e precipitação interna em uma encosta com Floresta Atlântica no Parque Nacional da Tijuca, RJ, Brasil.

“…A Precipitação Internaapresentou valores médios de 45,9 mm (± 51,7) para a encosta nos eventos analisados, com maiores valores no Ev2 e Ev6 e menores em Ev5 e Ev7 (Figura 7), sendo esta variação temporal fortemente controlada pelo volume de chuva inicial (Tabela 1). Este é o resultado mais reportado na bibliografiacostuma ser o ponto central nas abordagensquando o tema é a interceptação de chuva e precipitação interna, com diversos trabalhos indicando valores de coeficiente de determinação (r 2 ) acima dos 0,95 como os encontrados no presente trabalho, tanto na Mata Atlântica (Diniz et al, 2013;Marques et al, 2018;Junqueira Jr., 2019;Arcova et al, 2020 a), quanto em povoamentos de Eucalipto (Sato et al, 2011;Paula et al, 2020) ou em outros ambientes no Brasil (Souza et al, 2019;Momolli et al, 2019;Queiroz et al, 2020) e no mundo (Livesley et al, 2014;Magliano et. al., 2019).…”

Monitoramento e modelagem do processo de interceptação em área de Cerrado stricto sensu

“…Recentemente, importantes estudos sobre os processos de interceptação em áreas de Caatinga foram realizados, não somente para determinação de percentuais em relação a precipitação, mas também sobre a variabilidade temporal desses processos (BRASIL et al, 2018(BRASIL et al, , 2020DE QUEIROZ et al, 2020;IZIDIO et al, 2013;RIBEIRO et al, 2019). Em contrapartida, ainda existem poucos estudos realizados na região do Pampa (FERRETO et al, 2021;REICHERT et al, 2017;SOUZA et al, 2019) e muito pouco se conhece sobre o processo de interceptação nesse bioma em áreas qe ainda tenham vegetação natural.…”